The Bronco was introduced in 1966 as a competitor to the small four-wheel-drive compact SUVs such as the Jeep CJ-5 and International Harvester Scout, and built on its own platform. A major redesign in 1978 moved the Bronco to a larger size, and it was built using a shortened Ford F-Series truck chassis to compete with the similarly adapted Chevrolet K5 Blazer. The full-size Broncos and the successor Expedition were produced at Ford's Michigan Truck Plant in Wayne, Michigan.